At first I thought they were pods but then I looked closer and they are moving around like little worms. Most are brownish color but I saw a few longer white ones too
Not much to go on since the pic is so far away, but I’d guess Polychaete - Dorvilleidae. I think almost everyone has these guys and they are 100% harmless. Do you have a magnifying glass or something to confirm? These are usually white and grey/tan in the center.